1. In a Dutch oven, brown roast on all sides in 1 tbs oil.
2. Meanwhile, in a large saucepan, saute onions in remaining oil until tender. Add remaining ingredients except rolls; bring to a boil. Reduce heat; simmer uncovered, for 15 min. stirring occasionally. Pour over roast. Cover and bake at 325 degrees for 2 hours; I turn the roast and bake for 2 more hours or until meat is very tender. Remove roast; shred with a fork and return to sauce. Serve on rolls.